Samsung Galaxy TabS User Manual page 36

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Exposure value: Change the exposure value.
This determines how much light the camera's
sensor receives. For low light situations, use a
higher exposure.
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Grid lines: Display viewfinder grid lines to help
composition when selecting subjects.
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The Volume key: Use the Volume key as the
camera key, the record key, or as a zoom key.
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Voice control: Set the camera to take photos
with voice commands.
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Help: View information on using the camera.
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Reset settings: Reset the camera settings.
Applications 31 Camera and Video